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dc.contributor.authorSTAR Collaboration
dc.date.accessioned 2020-10-30T18:49:10Z
dc.date.available 2020-10-30T18:49:10Z
dc.date.issued 2020
dc.identifier.citation STAR Collaboration. "Strange hadron production in Au+Au collisions at √sNN=7.7, 11.5, 19.6, 27, and 39 GeV." Physical Review C, 102, no. 3 (2020) American Physical Society: https://doi.org/10.1103/PhysRevC.102.034909.
dc.identifier.urihttps://hdl.handle.net/1911/109462
dc.description.abstract We present STAR measurements of strange hadron (K0S, Λ, ¯¯¯Λ, Ξ−, ¯¯¯Ξ+, Ω−, ¯¯¯Ω+, and ϕ) production at midrapidity (|y|<0.5) in Au+Au collisions at √sNN = 7.7–39 GeV from the Beam Energy Scan Program at the Relativistic Heavy Ion Collider (RHIC). Transverse-momentum spectra, averaged transverse mass, and the overall integrated yields of these strange hadrons are presented versus the centrality and collision energy. Antibaryon-to-baryon ratios (¯¯¯Λ/Λ, ¯¯¯Ξ+/Ξ−, ¯¯¯Ω+/Ω−) are presented as well and used to test a thermal statistical model and to extract the temperature normalized strangeness and baryon chemical potentials at hadronic freeze-out (μB/Tch and μS/Tch) in central collisions. Strange baryon-to-pion ratios are compared to various model predictions in central collisions for all energies. The nuclear modification factors (RCP) and antibaryon-to-meson ratios as a function of transverse momentum are presented for all collision energies. The K0S RCP shows no suppression for pT up to 3.5 GeV/c at energies of 7.7 and 11.5 GeV. The ¯¯¯Λ/K0S ratio also shows baryon-to-meson enhancement at intermediate pT (≈2.5 GeV/c) in central collisions at energies above 19.6 GeV. Both observations suggest that there is likely a change of the underlying strange quark dynamics at collision energies below 19.6 GeV.
dc.language.iso eng
dc.publisher American Physical Society
dc.rights Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
dc.title Strange hadron production in Au+Au collisions at √sNN=7.7, 11.5, 19.6, 27, and 39 GeV
dc.type Journal article
dc.citation.journalTitle Physical Review C
dc.citation.volumeNumber 102
dc.citation.issueNumber 3
dc.type.dcmi Text
dc.identifier.doihttps://doi.org/10.1103/PhysRevC.102.034909
dc.type.publication publisher version
dc.citation.articleNumber 034909


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